Oxygen sensor heater service bay test
US6386021B1 · kind B1 · utility
4Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Feb 16, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A diagnostic routine is used for testing an oxygen sensor heater of an internal combustion engine. The oxygen sensor heater is preheated prior to testing. A voltage signal from the oxygen sensor is measured after a predetermined period of time. If the voltage signal is greater than a threshold value after the predetermined period of time has elapsed, the oxygen sensor heater is considered to have failed the diagnostic routine. If the voltage signal is not greater than the threshold value after the predetermined period of time has elapsed, the oxygen sensor is considered to have passed the diagnostic routine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.